Long-stroke periscopic lens and lens module

Abstract

The invention relates to the technical field of optical anti-shake, in particular to a long-stroke periscopic lens and a lens module, the long-stroke periscopic lens comprises a base, a lens, a prism assembly and a guide assembly, the base is provided with a first end and a second end which are opposite, the lens is movably arranged on the base and is close to the first end, and the side wall of one side of the lens is provided with a driving assembly; the prism assembly is movably arranged on the base and located on the side, facing the second end, of the lens, the guiding assembly comprises a first guiding piece and a second guiding piece, the first guiding piece is arranged on the base and movably connected with the bottom of the lens, and the second guiding piece is movably arranged on the side wall, opposite to the driving assembly, of the lens. The second guide piece is connected to the base; the second guide piece is arranged on the side wall, opposite to the driving assembly, of the lens, the second guide piece can counteract lateral thrust generated by the lens due to the influence of a magnetic field in the focusing process of lens movement, and the precision and stability of the lens in the long-stroke movement focusing process are guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of optical image stabilization technology, and in particular to a long-stroke periscope lens and a lens module. Background Art

[0002] With the advancement of technology, people's demand for camera functions in portable electronic devices (such as tablets, smartphones, etc.) is still growing rapidly. For example, in order to achieve the functions of long-distance zoom shooting and close-up zoom shooting at the same time, the periscope lens is required to have a long stroke to achieve zoom. Existing long-stroke periscope lenses have a long total stroke. When the lens is in motion, or at the starting and end positions, it may be affected by the magnetic field and produce a large lateral thrust, which may cause the lens to shake, derail, or even flip over, affecting the shooting experience and image quality.

[0003] It should be noted that the information disclosed in this background technology section is only intended to increase understanding of the overall background of the present invention, and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to those skilled in the art. Summary of the Invention

[0004] In order to solve the problems of the above-mentioned existing long-stroke periscope lens that may shake, derail or roll over, the present invention provides a long-stroke periscope lens, which includes a base, a lens, a prism assembly and a guide assembly.

[0005] The base has a first end and a second end opposite to each other, the lens is movably arranged on the base and close to the first end, a driving assembly is provided on one side wall of the lens, the prism assembly is movably arranged on the base, and the prism assembly is located on the side of the lens facing the second end.

[0006] The guide assembly includes a first guide member and a second guide member. The first guide member is arranged on the base and is movably connected to the bottom of the lens. The second guide member is movably arranged on the lens and is located on the side wall opposite to the driving assembly. The second guide member is connected to the base.

[0007] Furthermore, the long-stroke periscope lens also includes a second magnet, a magnetic conductive plate is provided on the base, and the second magnet is arranged on the side of the bottom of the lens facing the magnetic conductive plate.

[0008] Furthermore, the number of the second magnets may be two or more.

[0009] Furthermore, the long-stroke periscope lens further includes a driving plate, and the driving plate is attached to the base.

[0010] Furthermore, the driving component includes a first magnet and a first coil, the first magnet is arranged on a side wall of the lens, the first coil is arranged on the driving plate, the setting position of the first coil corresponds to the first magnet, and the first coil is electrically connected to the driving plate.

[0011] Furthermore, the prism assembly includes a prism seat, a prism, a ball and a reed, wherein the prism seat is movably arranged on the base, the prism is arranged on the prism seat, a ball groove is provided on the end surface of the prism seat on a side away from the prism, the ball is movably arranged in the ball groove and protrudes from the ball groove and is movably connected to the base, the reed is located on the side of the prism seat away from the prism, and the two ends of the reed are respectively connected to the prism seat and the base; A third magnet and a fourth magnet are respectively provided on both sides and the bottom of the prism seat, and a second coil and a third coil are provided on the driving plate at positions corresponding to the third magnet and the fourth magnet.

[0012] Furthermore, the first guide member, the second guide member and the base are integrally formed.

[0013] Furthermore, the second guide member has a demoulding slope on one side facing the bottom of the base, and the angle α of the demoulding slope is 0°-20°.

[0014] Furthermore, the long-stroke periscope lens also includes a plurality of buffer components, and the plurality of buffer components are arranged on the base.

[0015] Furthermore, the present invention also provides a lens module comprising any one of the long-stroke periscope lenses described above.

[0016] Based on the above, the present invention provides a long-stroke periscope lens and lens module. Compared with the prior art, the first guide member and the second guide member are used to guide the lens, and the second guide member is arranged on the side wall opposite to the lens and the drive assembly. When the lens moves for focusing, the second guide member can offset the lateral thrust of the lens caused by the influence of the magnetic field, thereby avoiding the problems of lens shaking, derailment or even tipping over, ensuring the accuracy and stability of the lens during long-stroke movement focusing, and improving the shooting experience and imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort. The positional relationships described in the drawings in the following description are based on the orientation of the components in the drawings unless otherwise specified.

[0018] Figure 1 A schematic diagram of an exploded structure of a long-stroke periscope lens provided by one embodiment of the present invention; Figure 2 A schematic diagram of the exploded structure of a lens and a second magnet provided in one embodiment of the present invention; Figure 3 A schematic cross-sectional view of a lens and a guide assembly provided in one embodiment of the present invention; Figure 4 A schematic diagram of the forces acting on a lens and a guide assembly provided in one embodiment of the present invention; Figure 5 A schematic structural diagram of a driving board provided in one embodiment of the present invention; Figure 6 A schematic diagram of the exploded structure of a prism assembly provided by one embodiment of the present invention; Figure 7 A schematic cross-sectional view of a lens and a guide assembly provided in a second embodiment of the present invention; Figure 8 for Figure 7 Schematic diagram of the locally enlarged structure at N in the figure.

[0019] Reference numerals: DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variations thereof all mean "at least including".

[0022] See also Figure 1 , Figure 1 A schematic diagram of the exploded structure of a long-stroke periscope lens provided in one embodiment of the present invention.

[0023] To address the technical issues of existing long-stroke periscope lenses, which may experience shaking, derailment, or rollover, or to achieve at least one of the aforementioned advantages or other advantages, one embodiment of the present invention provides a long-stroke periscope lens. As shown in the figure, the long-stroke periscope lens includes a base 10, a lens 20, a prism assembly 30, and a guide assembly 40.

[0024] The base 10 provides a basic mounting space and foundation for the lens 20, prism assembly 30, and guide assembly 40. The base 10 can be injection molded from a material such as plastic. In practice, the base 10 has opposing first and second ends 11 and 12. The first end 11 has an opening to facilitate light emission for imaging.

[0025] The lens 20 is movably mounted on the base 10 and positioned adjacent to the first end 11. The lens 20 is movable relative to the base 10 along the Z-axis, thereby adjusting the focal length and zooming. Preferably, the lens 20 has a travel range of 7 mm, enabling this long-travel periscope lens to simultaneously achieve both long-range and close-range zoom capabilities.

[0026] A driving assembly 50 is provided on one side wall of the lens 20. The driving assembly 50 can be controlled to drive the lens 20 to move along the Z-axis direction, thereby achieving the purpose of adjusting the focal length and zooming.

[0027] The prism assembly 30 is movably mounted on the base 10 and is located on the side of the lens 20 facing the second end 12. Specifically, the prism assembly 30 and the lens 20 are coaxially aligned. The prism assembly 30 folds incoming light before it enters the lens 20 and exits through the opening at the first end 11 to form an image, thereby folding the optical axis and increasing the zoom ratio.

[0028] The guide assembly 40 includes a first guide member 41 and a second guide member 42. The first guide member 41 and the second guide member 42 are respectively arranged between the base 10 and the lens 20. When the drive assembly 50 drives the lens 20 to move along the Z-axis, the first guide member 41 and the second guide member 42 can provide guidance for the lens 20, allowing the lens 20 to move accurately, steadily, and smoothly along the Z-axis, thereby achieving the purpose of adjusting the focal length and zooming.

[0029] Preferably, the first guide member 41 and the second guide member 42 can be metal guide rods with smooth surfaces. Of course, the first guide member 41 and the second guide member 42 can also be made of other existing materials, as long as they can provide a stable and smooth guide for the lens 20, which is within the scope of protection of this application.

[0030] Taking the figure as an example, the first guide member 41 is movably mounted on the base 10 and movably connected to the bottom of the lens 20. In a specific embodiment, a first guide groove 13 is provided on one side of the base 10 near the drive assembly 50, extending along the Z-axis. The first guide member 41 is movably mounted in the first guide groove 13. A first guide mating groove 21 is provided on the lens 20 corresponding to the first guide groove 13. The first guide member 41 is slidably connected to the first guide mating groove 21.

[0031] The second guide member 42 is disposed on the lens 20 and is located on the sidewall opposite the drive assembly 50. Specifically, the second guide member 42 and the drive assembly 50 are disposed on opposite sidewalls of the lens 20. In a specific embodiment, the inner sidewall of the base 10 has a second guide groove 14 disposed along the Z-axis, and the second guide member 42 is movably disposed in the second guide groove 14. A second guide mating groove 22 is provided on the lens 20 corresponding to the second guide groove 14. The second guide member 42 is slidably connected to the second guide mating groove 22.

[0032] When the driving assembly 50 is controlled and drives the lens 20 to move along the Z-axis direction, the first guide member 41 and the second guide member 42 are both slidably connected to the lens 20, providing guidance for the lens 20, so that the lens 20 moves accurately, steadily and smoothly along the Z-axis direction, thereby achieving the purpose of adjusting the focal length and zooming.

[0033] Please combine Figure 1 See Figure 2-Figure 4Since the movement stroke of the lens 20 is long, the driving assembly 50 often uses a bipolar magnet, which causes the lens 20 to generate a lateral thrust in the X-axis direction under the influence of the magnetic field of the driving assembly 50 during the movement. Or lateral thrust in the negative X-axis direction .

[0034] At this time, the second guide member 42 is arranged on the opposite side wall of the driving assembly 50 to provide a limit and torque. , used to offset lateral thrust , to prevent the lens 20 from being subjected to lateral thrust The impact of the railway vehicle may cause shaking, derailment or even rollover.

[0035] By arranging the second guide member 42 on the side wall opposite to the driving assembly 50, when the lens 20 moves to focus, the second guide member 42 can offset the lateral thrust of the lens 20 caused by the influence of the magnetic field. , avoiding the problems of shaking and derailment of the lens 20, ensuring the accuracy and stability of the lens 20 during long-stroke motion focusing, and improving the shooting experience and imaging quality.

[0036] Based on the above, the long-stroke periscope lens further includes a second magnet 60. A magnetic plate 70 is provided on the base 10, and the second magnet 60 is positioned at the bottom of the lens 20, facing the magnetic plate 70. Preferably, there are two or more second magnets 60. This embodiment uses two as an example.

[0037] Taking the figure as an example, when the lens 20 is subjected to lateral thrust Due to the presence of the first guide member 41, the lateral thrust It is easy to form a rotation torque with the first guide member 41 as the center , which in turn causes the lens 20 to move along the moment The direction of the lens 20 is flipped, which eventually causes the lens 20 to flip sideways.

[0038] To counteract the torque , a magnetic plate 70 is set on the base 10, and two second magnets 60 are set at the bottom of the lens 20. The second magnet 60 and the magnetic plate 70 can generate magnetic attraction. and , forming a torque , thereby preventing the lens 20 from tipping over. At the same time, the second magnet 60 can reduce the force on the second guide member 42, preventing the second guide member 42 from being subjected to excessive force, which would cause a pit to appear in the second guide groove 14 or the second guide matching groove 22.

[0039] Of course, it is understood that the size of the magnetic plate 70 should be able to cover the range of motion of the lens 20, so that no matter how the lens 20 moves, a stable magnetic attraction can be generated between the second magnet 60 and the magnetic plate 70. and .

[0040] In some preferred embodiments, please combine Figure 1 See Figure 5 The long-stroke periscope lens further includes a driving board 80. The driving board 80 is attached to the base 10. The driving board 80 can be a soft board or a PCB board with embedded power and signal circuits.

[0041] In a specific embodiment, the drive assembly 50 includes a first magnet 51 and a first coil 52. The first magnet 51 is disposed on a sidewall of the lens 20. Specifically, the first magnet 51 is disposed on the sidewall of the lens 20 opposite the second guide member 42. The first coil 52 is disposed on the drive plate 80, and the position of the first coil 52 corresponds to the position of the first magnet 51. The first coil 52 is electrically connected to the drive plate 80.

[0042] When the driving board 80 controls the first coil 52 to be energized, the magnetic field of the first magnet 51 generates an Ampere force to cut the magnetic flux lines, thereby pushing the lens 20 to move relative to the base 10 along the Z-axis direction, thereby achieving the purpose of adjusting the focal length and zooming.

[0043] It is understandable that in order to accurately monitor and control the movement of the lens 20 in the Z-axis direction, a sensor IC (not shown) can be set on the first coil 52 to accurately read and control the movement of the lens 20, so as to improve the accuracy of zooming and avoid image blurring caused by poor zooming accuracy.

[0044] In some preferred embodiments, Figure 6 As shown, the prism assembly 30 includes a prism seat 31, a prism 32, a ball 33, and a spring 34. The prism seat 31 is movably mounted on the base 10. The prism 32 is mounted on the prism seat 31 and is on the same optical axis as the lens 20.

[0045] A ball groove 35 is formed on the end surface of the prism base 31 away from the prism 32. The ball 33 is disposed within the groove 35 and protrudes from the groove 35 to be movably connected to the base 10. A spring 34 is located on the side of the prism base 31 away from the prism 32, and its two ends are connected to the prism base 31 and the base 10, respectively.

[0046] In specific implementation, third magnets 36 are provided on either side of the prism holder 31. A second coil 81 is provided on the drive plate 80 at positions corresponding to the third magnets 36. The second coil 81 is electrically connected to the drive plate 80. When energized, the second coil 81 generates an ampere force under the magnetic field of the third magnet 36, causing it to cut through the magnetic flux lines. This, in turn, propels the prism holder 31, driving the prism 32 to rotate along the X-axis at a predetermined angle, with the ball bearing 33 as the fulcrum. This achieves anti-shake and improves image quality.

[0047] Furthermore, a fourth magnet 37 is provided at the bottom of the prism holder 31. A third coil 82 is provided on the drive plate 80 at a position corresponding to the fourth magnet 37. The third coil 82 is electrically connected to the drive plate 80. When energized, the third coil 82 generates an ampere force under the magnetic field of the fourth magnet 37, causing it to cut through the magnetic flux lines. This, in turn, propels the prism holder 31, causing the prism 32 to rotate along the Y-axis at a certain angle, with the ball bearing 33 as the fulcrum. This achieves anti-shake and improves image quality.

[0048] Similarly, to accurately monitor and control the rotation angles of the prism holder 31 and prism 32 in the X-axis and / or Y-axis directions, sensor ICs (not shown) can be installed on the second coil 81 and the third coil 82. These sensor ICs can accurately read and control the rotation angles of the prism holder 31 and prism 32, thereby improving the accuracy of image stabilization and preventing image blurring caused by poor image stabilization precision.

[0049] The second embodiment of the present invention further provides a long-stroke periscope lens, such as Figure 7 As shown, the long-stroke periscope lens of this embodiment differs from the long-stroke periscope lens described in the first embodiment in that: The first guide member 41 and the second guide member 42 are integrally formed with the base 10. Specifically, the first guide member 41 and the second guide member 42 can be integrally formed with the base 10 using the same material as plastic, thereby reducing component costs and assembly steps while ensuring that the lens 20 does not shake, derail, or tip over.

[0050] Preferably, if Figure 8 As shown, since the first guide member 41 and the second guide member 42 are integrally injection molded with the base 10, to facilitate demolding after injection molding and to prevent damage to the second guide member 42 during demolding, the second guide member 42 has a demolding slope 90 on the side facing the bottom of the base 10. Preferably, the angle α of the demolding slope 90 is 0°-20°.

[0051] In some preferred embodiments, the long-stroke periscope lens further includes a plurality of buffers 100. These buffers 100 are disposed on the base 10. These buffers 100 can eliminate hard collisions between the lens 20, prism assembly 30, and the base 10, preventing noise and vibration generated by such collisions from affecting functions such as zoom, focus, and anti-shake, thereby improving image quality.

[0052] In some preferred embodiments, the long-stroke periscope lens further includes an upper cover 110 . The upper cover 110 covers the base 10 .

[0053] In some preferred embodiments, the present invention also provides a lens module comprising any one of the long-stroke periscope lenses described above.

[0054] To summarize, the long-stroke periscope lens and lens module provided by the present invention, compared with the prior art, adopt a first guide member and a second guide member as guides for the lens, and the second guide member is arranged on the side wall opposite to the lens and the drive assembly. When the lens moves for focusing, the second guide member can offset the lateral thrust of the lens caused by the influence of the magnetic field, thereby avoiding the problems of lens shaking, derailment or even tipping over, ensuring the accuracy and stability of the lens during long-stroke movement focusing, and improving the shooting experience and imaging quality.

[0055] Although the terms such as guide assembly, guide member, etc. are used more frequently in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

[0056] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention may be improved in only one or several aspects, without having to simultaneously solve all the technical problems listed in the prior art or background art. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as limiting the claim.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A long-stroke periscope lens, characterized by: include a base having opposing first and second ends; a lens movably disposed on the base and close to the first end, with a driving assembly being provided on one side wall of the lens; a prism assembly, the prism assembly being movably disposed on the base, and the prism assembly being located on a side of the lens facing the second end; The guide assembly includes a first guide member and a second guide member, the first guide member is arranged on the base and is movably connected to the bottom of the lens, the second guide member is movably arranged on the lens and is located on the side wall opposite to the driving assembly, and the second guide member is connected to the base.

2. The long-stroke periscope lens according to claim 1, characterized in that: The long-stroke periscope lens further includes a second magnet. A magnetic conductive plate is provided on the base. The second magnet is arranged on a side of the bottom of the lens facing the magnetic conductive plate.

3. The long-stroke periscope lens according to claim 2, characterized in that: The number of the second magnets may be two or more.

4. The long-stroke periscope lens according to claim 1, wherein: The long-stroke periscope lens further includes a driving plate, which is attached to the base.

5. The long-stroke periscope lens according to claim 4, characterized in that: The driving component includes a first magnet and a first coil. The first magnet is arranged on a side wall of the lens, and the first coil is arranged on the driving plate. The setting position of the first coil corresponds to the first magnet, and the first coil is electrically connected to the driving plate.

6. The long-stroke periscope lens according to claim 4, characterized in that: The prism assembly comprises a prism seat, a prism, a ball and a spring. The prism seat is movably arranged on the base, and the prism is arranged on the prism seat. A ball groove is provided on the end surface of the prism seat on a side away from the prism. The ball is movably arranged in the ball groove and protrudes from the ball groove and is movably connected to the base. The spring is located on the side of the prism seat away from the prism, and the two ends of the spring are respectively connected to the prism seat and the base. A third magnet and a fourth magnet are respectively provided on both sides and the bottom of the prism seat, and a second coil and a third coil are provided on the driving plate at positions corresponding to the third magnet and the fourth magnet.

7. The long-stroke periscope lens according to claim 1, wherein: The first guide member, the second guide member and the base are integrally formed.

8. The long-stroke periscope lens according to claim 7, characterized in that: The second guide member has a demoulding slope on one side facing the bottom of the base, and the angle α of the demoulding slope is 0°-20°.

9. The long-stroke periscope lens according to claim 1, characterized in that: The long-stroke periscope lens further includes a plurality of buffer components, and the plurality of buffer components are arranged on the base.

10. A lens module, characterized in that: It comprises the long-stroke periscope lens as described in any one of claims 1-9.

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